Parmandur
Book-Friend, he/him
Honestly, I think Chris Perkins has designed the entire 5E Adventure line to facilitate a Lego-like build your own High Adventure Zone environment.I'd go with a small scale sandbox based on LMoP:
- Use Dragon of Icespire as a list of possible side treks once they are established in Phandalin.
- Position TftYP's adventures somewhere on the map not to far from your Phandalin.
- Do the same with Saltmarsh's adventures.
So with all that you have an incredible adventure (LMoP) with a boat load of possible adventures sites to create the ultimate High Adventure Zone.